상세정보
학술대회
A PCA Decomposition for Real-time BRDF Editing and Relighting with Global Illumination
- 발행일
- 201006
- 출처
- Eurographics Symposium on Rendering (EGSR) 2010, pp.1469-1478
- 협약과제
- 10MT1800, 차세대 체감형 콘텐츠를 위한 사용자 동작기반 플래폼 및 입체 상호작용기술개발, 남승우
- 초록
- We propose a novel rendering method which supports interactive BRDF editing as well as relighting on a 3D scene. For interactive BRDF editing, we linearize an analytic BRDF model with basis BRDFs obtained from a principal component analysis. For each basis BRDF, the radiance transfer is precomputed and stored in vector form. In rendering time, illumination of a point is computed by multiplying the radiance transfer vectors of the basis BRDFs by the incoming radiance from gather samples and then linearly combining the results weighted by user-controlled parameters. To improve the level of accuracy, a set of sub-area samples associated with a gather sample refines the glossy reflection of the geometric details without increasing the precomputation time. We demonstrate this program with a number of examples to verify the real-time performance of relighting and BRDF editing on 3D scenes with complex lighting and geometry. © 2010 The Eurographics Association and Blackwell Publishing Ltd.
- KSP 제안 키워드
- 3D scenes, BRDF editing, Controlled parameters, Glossy reflection, Level of accuracy, Principal Component analysis, Real-time performance, Transfer vectors, global illumination, radiance transfer, sub-area